Gauge



, 1,671,703 L. CROSBY GAUGE Filed Apgil 28, 1926 y /////fl 1 0 35 l Crow y,

Attorn ey Inventor Patented May 29, 1928.

" LESLIE cnosny, or ero sm, onnoon.

canon l Application and April 2a, 1926. Serial no.,105,1es.

My present invention pertains to gauges, and contemplates the provision of an easily applied and accurate cylinder alinement gauge-i. e., a gauge for testing the alinenient of a cylinder or round hole with respect to a plane surface at the end of the cylinder or hole, 1 i

Other objects and practical advantages of ,the invention willibe fullyunderstood from ,the following description and claims when the same. are readin connection with the drawings, accompanying and forming part i of this specification, in, which Figurel is a View, partly inelevation and partly in section, illustrating my novel gauge as properly arranged with respect to a cylinder. v

I Figure 2 is a top plan view of the gauge.

Figure 3 is a detail horizontal section taken through the slidable contact member of my improvement andthe spindle on which said contact member is mounted.

Similar numerals of reference designate corresponding parts in allot therviews of.

the drawings.

I show in Figure 1, a cylinder block 1, and the bore of the c linder in said block is designated by 2, an the planesurface at the end of the cylinder is designated by 3. Amo ng other elements my novel gauge comprises a body or bridge bar 3*, the said body 8* being flatandstraightjat itsx mderside so asto bridge the cylinder opening and rest solidly on the-plane surface 3 at diametrically opposite. points. The said body 3 'is headed at 4* and is provided with avertically disposed bore 5 which is'preferably shaped as shown so as to permit of rectilinear movement of an uprightspindle 6 through the said bore 5 whlle preventing turning of the spindle about its axis in the body 3*. The spindle 6 is adjustably fixed to the body 3* through'the medium of a set screw 7. It will also be noticed that the body 3* is equipped with an upright post 8. The lower end portion of the s'indle 6- is bifurcated as designated by 9 an in said bifurcation is pivoted at 10 the angularly deflected lower portion 11 of the swingable indicating finger 12 of the gauge. The said finger 12 is engaged by and is subject to the action of an appropriate spring 13" carried by thespindle 6 and extending into the bifurcation 9 so as to bear on the laterally deflected portion of the finger 12 after the manner shown in Figure 1. The spring 13 engaging the post 8. graduated to represent thousandths of an tends to throw or, move the upper end of the finger 12 toward the right in Figure 1. i

The lower end of the finger 12 is preferably rounded as illustrated in Figure 1 and constitutes the IOWQI', Contact of the gauge. The upper contact, orcontact member of the gauge is designated by 13 and is preterably rounded as designated by 14 and is equipped with a spring-pressed pin 15 through the medium of which the contact member 13 is adjustably held by frictional contact on the spindle (i. Manifestl the contact member 13 may bereadily ad usted on, the spindle 6 in tlle idirection of the length of the latter and the said contact member will be frictionally held in the po sition in which it is placed.

The spindle 6 has fixed thereto a lateral arm 21 on which is agraduated scale 20, Figure 2, and by which is carried a set screw The scale 20 is inch. The post 8 extends through an aperture in the arm 21. Itlwill also be understood that the arm 21 has a slot 23, Figure 2, in which the upper end of the finger 12 is adapted to move, the said end being provided with a lateral pointer for cooperation with the graduated scale 20.

In the general use of the gauge, if the cylinder is, eight-inches in length, set the spindle 6 so there is a distance of four inches from the lower contact to the upper contact and insert the gauge in the cylinder pressed firmly against one *side of the cylinder; Assume the index.registers.012. Reverse the instrument and press to the other side of the cylinder; Assume the index registers .008, but on the other-side of the zero oint, the sum of the two readings .020 inc es is the error of alinement. the two readings, .004 inches in this instance, is the taper or wear except where the finger rests on the same side of the zero point on both tests; the sum of the two readings be ing then the taper, and the difference, the error of alinement. It should also be noted that in adjusting the gauge, the spindle should be locked firmly before tightening the screw 25. The slidable contact should always be as close to the top as possible. The reason for using the" gauge on only one half of the cylinder that by so using the gauge the alinement of one side of the cylinder is compared with the alinement directly opposite, the result being that the answer ob- The difference in conditions such as taper or error in the gauge itself.

The reading obtained is always in thousandths of an inch regardless of the dim tance between the contacts.

I have entered into a detailed description of the construction and relative arrangement of the parts embraced in the present and preferred embodiment of my invention in order to impart an exact understanding of said embodiment. I do not desire, however, to be understood as limiting myself to the precise construction and relative arrangement of parts as disclosed, my invention being defined by my appended claims within the scope of WlllCll modifications .may be made without departure from my invention.

Having 'dGSCIIbBd my invention, what I claim and desire to secure by Letters Patent, is z-- 1. In a gauge, and in combination, a body, a spindle associated with said body and disposed at right angles thereto, a contact memher on the spindle, a scale bearing member carried by the spindle and spaced outwardly from the body and extending in the same general direction as the body, and a spring influenced finger pivotally connected to the spindle and having a contact portion spaced from said contact member and also having a portion for cooperation with the smile on the scale bearing member and swingably movable relative to the body and said scale bearing member.

2. In a gauge, and in combination, a body, a. spindle associated with said body and disposed at right angles thereto, a contact memher on the spindle, a scale bearing member carried by the spindle and spaced outwardly from the body andextending in the same general direction as the body, and a spring influenced finger pivotally connected to the spindle and having a contact portion spaced from said contact member and also having a portion for cooperation with the scale on the scale bearing member and awiiyabl movable relative to the body and sai a bearing member; the said spindle being adjustably fixed to said body, and the said contact member being adjustable on the spindle in the direction of the length thereof and held by frictional contact to the spindle and against casualmov ement.

3. In a gauge and in combination, a body adlffid to bridge a cylinder opening and rest on a plane surface at opposite sides of said opening, a spindle'extendingthrwgh,

means for adiustably the spindleto the body, an arm on the upper portion of the spindle and bearing a scale, a contact member sliduble on the spindle and adjustably maintained by frictional contact thereon, and a spring influenced finger pivoted at an intermediate point of its length to the spindle and having a contact at one end spaced from said contactmember and also having a finger at its other end for. cooperation withthe scale on the said spindle arm.

4. In a gauge, and in combination, a body adapted to bridge a cylinderopenin and rest on a plane surface at opposite s' as of said opening, a spindle extending through, means for adjustably fixing the spindle to the body, an arm on the upper portion of the spindle and bearing ascale, a contact member slidable on thespindle and 'edjustably maintained b frictional contact thereon, and a spring influenced finger pivoted at an intermediate point of its length to the spindle and having a contact at one end spaced from said comedmember and also having a finger at its other end for ration with the scale on the said spindle; the said bodybeing equipped with an upright post in parallelism with said spindle, andthesaid arm of the indie having a bore receiving said post a I being equipped with a set screw whereby said am may be adjnstably fixed to said om In testimony whereo I afix my signature.

LESLIE onosnr. 

